[Polytypical species of mosquitoes. 1. Anopheles hyrcanus (Passas, 1771)].

An. hyrcanus differs from close An. sinensis Wied. from south-eastern Asia in the following characters: colour of palps and wings, scales of hind abdominal sternites (Table 1). Populations of An. hyrcanus from various regions of the Soviet Union display great variability of systematic characters. The comparison of specimens from the western and eastern parts of the distribution area has shown that the difference between them is negligible and unstable (Table 2). We have no reason to assign An. hyrcanus from the Far East of the USSR to a distinct subspecies.